12011005061660 has 96 divisors (see below), whose sum is σ = 28972146631680. Its totient is φ = 4136646931200.

The previous prime is 12011005061569. The next prime is 12011005061663. The reversal of 12011005061660 is 6616050011021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011005061663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15193370 + ... + 15964350.

It is an arithmetic number, because the mean of its divisors is an integer number (301793194080).

Almost surely, 2^{12011005061660} is an apocalyptic number.

12011005061660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011005061660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14486073315840).

12011005061660 is an abundant number, since it is smaller than the sum of its proper divisors (16961141570020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011005061660 is a wasteful number, since it uses less digits than its factorization.

12011005061660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774747 (or 774745 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 12011005061660 its reverse (6616050011021), we get a palindrome (18627055072681).

The spelling of 12011005061660 in words is "twelve trillion, eleven billion, five million, sixty-one thousand, six hundred sixty".